1. Faculty of Electrical Engineering Technology, Universiti Malaysia Perlis, Perlis, Malaysia
2. Research Organization of Science and Technology, Ritsumeikan University, Shiga, Japan
3. Department of Mechanical Systems Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
4. Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, Tokyo, Japan
5. Department of Robotics, College of Science and Engineering, Ritsumeikan University, Shiga, Japan